CALGARY -- The man accused in a scary attack on a C-Train driver is linked to a local white supremacist group, according to sources.

The 22-year-old was arrested after a four-year transit veteran was chased by a knife-wielding man, narrowly escaping injury when he ran into a train cab and locked himself inside early Monday morning.

The man now charged in the attack is said to be an associate or member of the Aryan Guard, sources confirmed.

Transit and police officials said the attack unfolded when an emergency button in a C-Train was pushed about 1:30 a.m.

The driver, who sources confirmed is non-white, spoke to someone in that train via a two-way speaker who said the emergency activation was accidental.

After reaching 7 Ave. and 4 St. S.W., the operator went to the car to reset the emergency button and was confronted.

Police could not say whether he was lured, but officials did say they do not believe the suspect and person who told the operator there was no emergency are the same.

As the stranger rushed towards the operator, he ran to a nearby cab where he stayed until police arrived.

Officers received the same treatment from the menacing, knife-waving man.

It wasn't until they were forced to use a Taser to subdue him that he dropped the knife.

Police previously said they do not know the motivation behind the attack.

They and transit officials could not be reached last night to comment on whether they are looking into the possibility it was a racially motivated incident.

Officials previously said the incident appears to be a rare, albeit disturbing scenario.

John Richard Marleau, 22, is charged with numerous offences, including three counts of assault with a weapon and causing a disturbance.